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yellowing leaves

 
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laidbackdood
Citruholic
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Joined: 05 Jan 2006
Posts: 180
Location: Perth.Western Australia.

Posted: Tue 31 Mar, 2009 10:42 pm







Wondering whats happening here folks.The mix is not wet,drains well
I transplanted about month and a half ago.Leaves never looked very green.Havent fed since.Leaves dropping off and going yellow.This is a dwarf ugli fruit.Has slow release fert in the mix.Plastic container.Autumn here in Auckland now.cheers[/img]
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Millet
Citruholic
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Joined: 13 Nov 2005
Posts: 6656
Location: Colorado

Posted: Wed 01 Apr, 2009 12:38 am

Looks like the tree is badly deficient in magnesium. Have you been applying magnesium sulfate (Epsom Salts)? Dissolve one table spoon of Epsom Salts in a gallon of HOT water, and apply the COOLED solution to the tree once a week until symptoms disappear. NOTE: Epsom Salts does not dissolve well in cold water, therefore be sure to dissolve in hot water. - Millet (1,390-)
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Laaz
Site Owner
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Joined: 12 Nov 2005
Posts: 5682
Location: Dorchester County, South Carolina

Posted: Wed 01 Apr, 2009 12:43 am

I agree with millet. I also have a UGLI and it is notorious for showing any deficiency. It is a real pain to keep it looking good.

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laidbackdood
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Joined: 05 Jan 2006
Posts: 180
Location: Perth.Western Australia.

Posted: Wed 01 Apr, 2009 3:54 am

Hi,thanks very much.I will be on to it tomorrow.Its putting out some new growth now.Cheers
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Brancato
Citruholic
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Joined: 14 Mar 2009
Posts: 163
Location: Jamestown, Colorado, 9K

Posted: Tue 23 Jun, 2009 3:13 pm

Hey everyone,

So I have yet another question about yellowing leaves. I have a 2-3 yr old Eureka lemon that I just recently got and repotted into a 4:1 CHC to peat mixture about 2-3 weeks ago. The tree came from Four Winds Growers and arrived in fantastic shape but since I repotted it I have begun to notice a little yellowing of the veins of some of the younger/newer leaves. So far the affected area seems to be limited to the center of the tree but the yellowing seems to be becomming more pronounced and effecting more and more leaves (that have a tendency to easily fall off when brushed up against). In general the tree looks fairly healthy but I have read many threads that said to be cautious of yellowing of younger leaves.













I searched for posts about yellowing of younger leaves and googled it as well and came across a wide variety of possibilities. I figured showing folks with much more expierance than myself would be the best thing to do. If anyone has any suggestions or would like me to provide any extra info feel free to let me know!
Thanks,
Joe
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Brancato
Citruholic
Citruholic


Joined: 14 Mar 2009
Posts: 163
Location: Jamestown, Colorado, 9K

Posted: Wed 24 Jun, 2009 10:46 pm

Another thing also, I hadn't been loosing many leaves but I noticed today when I got home that I had lost about 15 or so leaves which worries me a little bit. Not sure if this matters or not also but the temp here the past few days has been rather hot (85-95). I know citrus do not like it too hot and to protect them during the middle of the day but my trees face East and just get some shade from the overhang of my balcony around noon.

Thanks again,
Joe
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Millet
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Joined: 13 Nov 2005
Posts: 6656
Location: Colorado

Posted: Wed 24 Jun, 2009 11:10 pm

Joe, 85 to 95 is not harmful to your tree. 86F is just abut the perfect temperature for a citrus tree's growth. The veins on the tree's older leaves are yellow, have you been fertilizing your tree? Yellow-orange veins on the older leaves are a symptom of nitrogen deficiency. Being in a new CHC/peat medium, it will almost be impossible to over water your tree, therefore, because you received the tree bear root, and just potted it, be sure you are not under watering. The best. Millet (1,305-)
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Brancato
Citruholic
Citruholic


Joined: 14 Mar 2009
Posts: 163
Location: Jamestown, Colorado, 9K

Posted: Thu 25 Jun, 2009 1:31 am

Thanks for the reply Millet! I did fertilize it about a week after I repotted it (Dynamite All-Purpose slow release w/ micros 18-6-Cool. Since then I fed it once with a seaweed water soluble fert (5-2-4 I think?), but I have only had to water my trees twice now since I've only had them a few weeks. I was wondering if I was underwatering it but like I said it had been raining everyday/other day for the past few weeks (around 65F mainly) and the medium was staying kinda damp so I had been hesitant to water any of my citrus. Just the past couple/few days have been hot.

Also Millet, I was wrong about the newer leaves being effected, youre right that the problem seems to be the older ones. This worries me less now that you pointed that out (I assumed the smaller leaves were newer ones, should have known better to assume anything). Since the lemon has only had fertilizer for a week or two now I bet this is likely something that will correct itself soon.

On another note, I spent all day yesterday looking for a good water soluble fertilizer and 3 nurseries and 1 big box later I still have nothing. Whenever I came across a good formulation the nitrogen source was ALWAYS high in urea which I read can be problematic (beirut toxicity?). I am kind of stumped here and would love any and all suggestions!

Thanks everyone,
Joe
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